Stretching-frame



(No Model.) 2 sneens-sheen 1. G. F. STENGEL. STRETGHING FRAME.

No. 410,745. Patented Sept. 10, 1889.

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(No Model.) G F STENGEL 2 Sheets-Sheet 2. STRBTGHING FRAME.

No. 410,745.` Patented Sept.10, 1889.

wlTNEssEs; INVENTOR- 1 George FZSteng/L BY ATTYs.

N. PETERS. Phmo-ulhogmplmr, wnmmmw, D. Cv I UNITED STATES GEORGE F. STENGEL, OF

PATENT OFFICE.

NEWARK, NEV JERSEY.

STRETCHING-FRAME.

SPECIFICATION forming part of LettersvPatent No. 410,745, dated September 10, 1889.

Serial No. 246,495. (No model.)

To @ZZ whom, it may concern:

Be it known that I, GEORGE F. STENGEL, a citizen of the United States, residing at Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Stretching-Frames; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.,

The purpose of this invention is to provide a stretching-frame of the improved construction for hides, by means of which the said hide, while in the process of drying or stretching, can be still further stretched until theleather is set. To this end l have devised a stretching-frame illustrated in the drawings, which is provided with adjustable sides, to which the hide is fastened, and which, by reason of their adjustability, can be spread apart from time to time, thus increasing the number of square feet of leather in the hide.

In the accompanying sheet of drawings is illustrated my improved stretching-frame, in which Figure lis a plan View of the same, showing the relation of the parts and the hide secured thereto. Fig. 2 is a section of Fig. l through line oc. Fig. 3 is an enlarged plan in detail of the adj usting-screws and sockets. Fig. et is an elevation of one of the sockets on the adjustable pieces, and Fig. 5 is a side elevation of the adjusting bolt or screw and section of the frame.

As indicated in said drawings, the stretching-frame consists of four frame-pieces d, b, c, and d, bolted or otherwise secured together at four `points e, as shown. On` two sides of said stretching-frame the frame-pieces extend, forming guiding-pieces b', d, c', and a', as indicated. Between said guiding-pieces, on two sides of the frame, are arranged the adjustable stretching-bars f, which move toward and from the rigid portions of the frame c and d.

The device shown in the drawings for adj Listing said bars f between the guiding-pieces consists of a threaded rod g, which passes' through the sockets h and t', secured to said adjustable pieces, and through the threaded socket j, secured to the rigid frame-pieces d and c of the stretching-frame. A collar k is secured on said rod between the separated portions of the socket t', to prevent any longitudinal movement of the threaded rod in relation to the adjustable pieces f, and at the same time to permit the free rotation of said adjustable threaded rods.

The threaded rod may be squared on the outer end to receive a crank-handle l, or may be provided with finger-pieces, whereby the same may be turned by hand, as desired.

The operation is as follows: The hide having been tacked or attached to the two rigid frame-pieces d and b on two of the edges of said hide, the two remaining edges are secured or attached to the adjustable bars f, as shown in Fig. l. The threaded rods are then turned and the hide stretched in the direction of its width and its length, as will be understood.

The guiding-pieces ct,b, c', and d act to prevent any lateral movement of the guidingbars f.

By reference to Fig. 3 it will be seen that the adj ustin g-screws and sockets are arranged on the back of stretching-frame, and the leather is tacked to the raised faces of the frame-pieces a and b and the adjustable pieces f. The views shown in Fig. 1 represent the back of the stretching-frame to more clearly bring out the relation of the adjusting-screws to the frame.

The stretching-frame here described may be used for wet stock, either hides or skins, but more particularly for stretching the dry stock.

In japanning or finishing the same, during the process of japanning several coats or applications of daub or japan are made to the leather and the japanned surfaces rubbed with pumice. This rubbing causes the leather to sag in parts, forming pocket-like depressions. In frames ordinarily constructed this pocket or depression must remain in the leather, and consequently there is not as perfect a finish as is desirable; but by means of my improved stretching-frame after each application of the daub and pumice the leather is stretched, so that when finished the surface is free from any im perfect-ions.

IOO

Having,l thus described my invention, what I elaiin as new isl. A leather-stretehing` frame consisting` of frame-pieces a, I), e, and d, provided with pro- 5 jecting ends u',h',c',andd,adjustable pieces f, arranged on two ad jaeentsides of said framepieces between the projecting ends, and means for adjusting` said pieces f in relation to the rigid portion of the frame, for the purposes to Set forth.

2. A stretehi11g-tra1ne consisting of the rigidly-attaehed traine-pieces a, l), e, and d, provided with projecting ends a', Z1', c', and d', adjustable pieces f, arranged on two adjacent I5 sides of said rigid frame-pieces between the projecting ends, threaded adjusting-rods eon- GEORGE F. STENGEL. lVitnesses:

FREDK. F. JAMPBELL, FREDK. C. FRAENTZEL. 

